Bought a 2nd hand print copy and absolutely loved it. A great exploration of George and his rewriting of history and going back on his word both behind the scenes and about the story of the films itself. It paints a great picture of how the films were crafted and how the story creatively evolved over the years, with constant retcons.
The evolution of who Vader was, who Luke’s father was, with Kaminski coming to a great conclusion on exactly when they were merged into one. The exploration of the early 9-15 episode series, potential antholgy stories, unwritten sequel trilogies, mysterious Journals of the Whills, this book has it all.
Everything is cited and its sources listed in a hefty section at the back of the book, so you can tell that this was all heavily researched and isn’t coming out of thin air. It’s a great read that isn’t Lucasfilm sanitised.

I really oughta re-read it, as well as “How Star Wars Conquered the Universe” which I haven’t read yet, but have heard great things about.